Tool support for gear cutters



Amai 1 1924, 1,489,222

R. O. RICE TOOL SUPPORT FOR GEAR CUTTERS Filed July 28 1921 2 Sheets-Sheet 1 f uv" "1| lul @Horne AWN 1 1924. 1,489,222

R. O. RICE TOOL SUPPORT FOR GEAR CUTTERS Filed July 28. 1921 2 sheets-sheet 2 @11 JW M4247 A A G Patented Apr. 1, 51924. 'I i ROY O. RIC-IE,` OF INDIANAPLIS, INDIANA, ASSIGNOR TO SATEVENSON GEAR COMPANY), OF INDIANAPOLIS, INDIANA, CORPORATION OF DELAWARE.'

i appnqaan alea ruiy'es,

chinevdesigned for forming gears and other polygonal articles, in which the circumferential series of cutting or forming toolsI are arranged to act simultaneously upon the blank. f

The object of my invention is to provide means by .which ltheseveral cutting tools may be simultaneously adjusted and sup.- ported, the construction being such that the tools are free for adjusting movements and firmly clamped just prior to, and during, thecutting operation.

The accompanying drawings illustrate my invention. Fig. 1l is an elevation of the niachine embodying my improvements; Fig. 2.

an axial section, on an enlarged scale, vof,I

my improvements; Fig. 3, a plan of the parts shown in Fig. 2; Fig. 4, a fragmentary plan ofthe parts shown in Figs. 2and 3, and Fig. 5, a detail of rod 75. Y

In the drawings, 10 indicates a vertically reciproc-able plunger or mandrel carrying blanks 11 which are to be operated upon. This plunger 1() is to be reciprocated by an suitable means common and well known an therefore not illustrated or described in detail herein. Y

Co-axial with plunger 10 is any annular base or support12 provided with la cylin4 drical central portion 13 which isv co-axial with plunger 10. Threaded upon cylinder 13 is a ring 14 provided. with a' conical tool clamping surface 15 and also provided with a circumferential series of gear teeth 16 which mesh with a pinion 17 which is joui. naled in the pocket 18,- in base 1,2, upon pin 19. y l

Ring 14 lies in an annular pocket 21 formed in base 12 between cylinder 13 and a shorter annulus 22, which annulus is eX- ternally threaded as indicated at23. The upper end of annulus 22 carries a hardened ring 24 in which are formed aseries `of angularly spaced radial notches 25, the purpose of which will appear.'

Threaded upon the threads '23 is a clamping ring .26 which is provided with an in- 1921. Serial No. 488,061.

ternal conical tool-clamping face 27 havin g the same pitch as, and therefore parallel with, the cone 15. Ring'26 is provided externally. with a circumferential series of gear teeth 28 which mesh with the inion 29 carried by sleeve 30 and journa ed on shaft 31, journaled at its lower end in base 12. j

I ntegr'al with, or secured to, base 12, is a ring 32 which is perforatedat '33 to permit the projection of pinions 29 and 34 therethrough. Pinion 34 is keyed to shaft 31 and meshes with pinion 17.' Rin 32 is internally threaded at 35 and t ese threads receive external threads 36 carried by ring .37 which is provided with van internally projected iiange l33 engaging the outer circumference lof a tool clamping ring 39. Ring 37 is oscillated by a spring link 37 from bar 76.

The upper end of cylinder 13 carries a tool-seat ring y41 which is provided with a plurality of circumferentially spaced radial tool-seats 42, corresponding in nume ber and arrangement with the grooves 25. Seated in each groove 25 is the tool carrier 743 provided with a downwardly and out-I wardly projecting tail 44 adapted to lie, and be olamped'between the cones 15 and 27, the lower end of said tail fitting laterally in groove 25 and resting upon the bottom lof said groove., Each tail carries one or more springs 45 in pockets 46'and engages cone 15. lt is obvious that the tools themselves may be shaped in a manner similar to the tool carriers if so desired.

.1 The forming tools may be either integral with holder 43 or separate therefrom, as shown in Fig. 2. The holders 43 lie between rings 41 and 39 and ring 39 is held a ainst turning by means of one or more pins 51 extended from ring 39 to ring 41.

ln order to manipulate the tool-clamping and positioning parts 14, 26 and 39, autoyrnatically, I have provided the following ico Ring 14 needs to be gradually lowered 'on the cylinder 13, and for this purpose cut.

Journaledon sleeve 30 is a pawl-ca-rrying arm 72 which carries two pawls, 70 and 71', adapted to engage respectively the ratchet wheels and 71. l,

ln order that the forward (downward) movement of cone 27 may be variable, l provide a guard 73, of common form, to co-act with pawl 71 so that, although the stroke of arm 72 is a constant one, the edectiveness of awl 71 u on the ratchet wheel 70 ma P P a Y be variable in the well known manner.

Arm 72 is reciproca-ted, through the medium of connecting rod 7 5, by any suitable reciprocating member 7 6 synchronized with the plunger 10, and in order to compensate the differences in possible movements, l at 'the same time operate arm 62 by the same member 76.

Link 75 is a two art structure as shown c P a in Fig. 5, with an intermediate compression spring 77. y

The effectiveness of pawl 61 upon ratchet wheel 60 is regulated by a guard 78.

The operation is as follows Cone 15 is vertically adjusted until it `will establish that radial position of tools 50 which will produce the desired initial cut in the blank 11, this being preferably done by throwing out pawl 61 and manually manipulating ratchet wheel 60; cone 27 is then screwed downtightly upon tails 44 by throwing out pawl 70 and manuallymanipulating ratchet wheel 70: and ring 37 is screwed down `so as to firmly clamp ring 39 upon the various tool holders by manually manipulating ratchet wheel 7l. Thereupon, plunger 10 is moved downwardly so as to cause the first cut. At the completion of this cutting stroke'backward reciprocation of member 76 operates to pull upon link 63, so as to act.' on pawl 70 and ratchet wheel 70, sleeve '80, pinion 29, and teeth 28 to turn ring :26 so as to move it upward onthreads 23, thereby retracting cone 27 from tails 44 and thereby permitting springs 45 to move the tools 50 radially outwardly enough to provide proper clear-` ance. At about the Sametime, pawlv 61, acting upon ratchet wheel 60, turns shaft 31, pinions 34 and 17 and ring 14 so as to screw said ring 14 downwardly on part 13. the amount of this downward movement of cone 15 determining the depth of the next At the same time that cone 27 is retracted from tails 44, ring 37 is oscillated so as to screw upwardly in threads 35 to release the clamping ring 39 so that the tool holders 4.3 may be readily shifted radially iu their seats 42.'

After cone 15 has been set to determine the depth of the next cut, element 76, exerting a push upon link 63 through the compression of s ring 77, acts-through pawl 71 ratchet whee Y to screw cone 27 down upon the tails 44 70,-sleeve 30 and gear 29 iaeaaaa vhaving an inclin'ed tail, a series of seats for said tools, a pair of cones having co-related faces between which the tails of the tools may be clamped, and means for shifting said cones axially to shift said tools in their seats.

2. ln an apparatus of the class described, the combination of a circumferentially spaced series of forming tool carriers, each having an inclined tail, a series of seats for said tools, a clamping ring for clamping said tools in their seats, a pair of cones having co-related faces between which the tails of the tools may be clamped, and means for shifting said cones axially to shift said tools in their seats.

3. ln an apparatus of the class described, the combination of a circumferentially spaced series of forming tool carriers, each having an inclined tail, a series of seats for said tools, a clamping ring for clamping said tools in their seats, a pair of cones having co-related faces between which'the tails of the tools maybe clamped, and means for shifting said` cones axially, said means comprising elements for alternately shifting one of the cones in opposite directions, the movements in one direction being greater than the movements in the opposite direction.

4. ln an apparatus of the class described, the combination of a circumferentially spaced series of forming tool carriers, each having an inclined tail, a series of seats for said tools, a cone bearing for the tails of said tools and means for shifting said cone bearing axially to vshift the tools in their seats.

5. ln an apparatus of the class described, the combination of a -circumferentially spaced series of forming tool carriers each having an inclined tail, a'series of seats for said tools, means for clamping said tools in their seats, a cone bearing for said tails and means for shifting said bearing axially to shift the tools in their seats.

6. ln an apparatus of the Iclass described, a combination of a circumferentially spaced series of forming tool carriers each having an inclined tail, a clamping ring for clamping said tools in their seats, a pair of cones matinee having (5o-related faces between which the tails of the tools may be clampedymeans for intermittently alternately operating said clamping means to clampand release the tools in their seats and means for alter nately and intermittently first moving said cones axially relatively and then moving -one of said cones axially in the same direetion the other one had previously been moved. l Y

In Witness whereof, I ROY O. RICE, have hereunto set my hand at Indianapolis, Indiana, this 16th lday of July, A. D. one thousand nine hundred and twenty-one.,

Rev e. nien. 

